Spiller.h revision 221345 
1//===-- llvm/CodeGen/Spiller.h - Spiller -*- C++ -*------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef LLVM_CODEGEN_SPILLER_H
11#define LLVM_CODEGEN_SPILLER_H
12
13namespace llvm {
14
15  class LiveRangeEdit;
16  class MachineFunction;
17  class MachineFunctionPass;
18  class VirtRegMap;
19
20  /// Spiller interface.
21  ///
22  /// Implementations are utility classes which insert spill or remat code on
23  /// demand.
24  class Spiller {
25  public:
26    virtual ~Spiller() = 0;
27
28    /// spill - Spill the LRE.getParent() live interval.
29    virtual void spill(LiveRangeEdit &LRE) = 0;
30
31  };
32
33  /// Create and return a spiller object, as specified on the command line.
34  Spiller* createSpiller(MachineFunctionPass &pass,
35                         MachineFunction &mf,
36                         VirtRegMap &vrm);
37
38  /// Create and return a spiller that will insert spill code directly instead
39  /// of deferring though VirtRegMap.
40  Spiller *createInlineSpiller(MachineFunctionPass &pass,
41                               MachineFunction &mf,
42                               VirtRegMap &vrm);
43
44}
45
46#endif
47